PDF in the case of the SA (red curve) and the best Gaussian fit (green curve) of the PDF of the statistic y = T(x) vs. the corresponding histogram H(y) obtained with a set of 105 MF filtered random realizations of a Poisson 13 × 13 pixels noise process with the parameter λ set to 0.01, 0.025, 0.05, and 0.1 counts pix−1 (see Sect. 5 for details). The used MF is given by Eq. (5) with s a circular Gaussian with standard deviation σ = 2 pixels normalized to unit volume.
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